/*************************************************************************
## Cow Clicker Mini-Game

### How to Play

At the in-game prompt type `jsp cowclicker` to start or stop
playing. Right-Click on Cows to score points. No points for killing
cows (hint: use the same keyboard keys you'd use for opening doors).

Every time you click a cow your score increases by 1 point. Your score
is displayed in a side-bar along the right edge of of the screen.

![cow clicker](img/cowclicker.png)

### Rules

 * You can join and leave the Cow Clicker game at any time by typing
   `/jsp cowclicker` at the in-game prompt.

 * Once you leave the game, your score is reset to zero.

 * You can disconnect from the server and your score will be saved for
   the next time you join.

### Gameplay Mechanics

This is meant as a trivially simple use of the [Bukkit Scoreboard
API][bukscore]. There are many things you'll want to consider when constructing
your own mini-game...

 * Is the game itself a long-lived game - that is - should players and
   scores be persisted (stored) between server restarts?  

 * What should happen when a player quits the server - should this also be
   understood as quitting the mini-game?

 * What should happen when a player who was previously playing the
   mini-game, joins the server - should they automatically resume the
   mini-game?

[bukscore]: http://jd.bukkit.org/beta/apidocs/org/bukkit/scoreboard/package-summary.html

***/

var store = {};

var scoreboardConfig = { 
    cowclicker: {SIDEBAR: 'Cows Clicked'}
};

/*
  The scoreboard is a simple wrapper around the Bukkit Scoreboard API.
  It's only concerned with display of scores, not maintaining them - that's the game's job.
*/
var scoreboard = (function(options){
    var temp = {};
    var ccScoreboard;
    var DisplaySlot = org.bukkit.scoreboard.DisplaySlot;

    return {
        start: function(){
            var objective, slot;
            ccScoreboard = server.scoreboardManager.getNewScoreboard();
            for (objective in options){
                var ccObj = ccScoreboard.registerNewObjective(objective,'dummy');
                for (slot in options[objective]){ 
                    ccObj.displaySlot = DisplaySlot[slot];
                    ccObj.displayName = options[objective][slot];
                }
            }
        },
        stop: function(){
            var objective, slot;
            for (objective in options){
                ccScoreboard.getObjective(objective).unregister();
                for (slot in options[objective]){
                    ccScoreboard.clearSlot(DisplaySlot[slot]);
                }
            }
        },
        update: function(objective,player,score){
            if (player.scoreboard && player.scoreboard != ccScoreboard)
            {
                temp[player.name] = player.scoreboard;
                player.scoreboard = ccScoreboard;
            }
            ccScoreboard.getObjective(objective).getScore(player).score = score;
        },
        restore: function(player){
            // offlineplayers don't have a scoreboard
            if (player.scoreboard)
                player.scoreboard = temp[player.name];
        }
    };
}(scoreboardConfig));

var _onPlayerInteract = function(listener, event){
    var player = event.player;
    var Bukkit = org.bukkit.Bukkit;
    
    if (!store[player.name])
        return;
    
    var clickedEntity = event.rightClicked;
    var loc = clickedEntity.location;
    var sound = function(snd,vol,pitch){
        loc.world.playSound(loc,snd,vol,pitch);
    };
    if (clickedEntity instanceof org.bukkit.entity.Cow)
    {
        store[player.name].score++;
        scoreboard.update('cowclicker', player, store[player.name].score);
        
        Bukkit.dispatchCommand(player, 'me clicked a cow!');
        sound(org.bukkit.Sound.CLICK,1,1);
        setTimeout(function(){
            sound(org.bukkit.Sound.COW_HURT,10,0.85) 
        },200);
    }
};
var _onPlayerQuit = function(listener, event){
    _removePlayer(event.player)
};
var _onPlayerJoin = function(listener, event){
    var gamePlayer = store[event.player.name];
    if (gamePlayer)
        _addPlayer(event.player, gamePlayer.score);
};

var _startGame = function(){
    if (config.verbose)
        console.log('Staring game: Cow Clicker');
    
    events.on('player.PlayerQuitEvent', _onPlayerQuit);
    events.on('player.PlayerJoinEvent', _onPlayerJoin);
    events.on('player.PlayerInteractEntityEvent', _onPlayerInteract);

    scoreboard.start();

    store = persist('cowclicker',store);
    for (var p in store){
        var player = server.getPlayer(p);
        if (player){
            /*
              only add online players
            */
            var score = store[p].score;
            _addPlayer(player, score);
        }
    }
};
var _addPlayer = function(player,score){
    if (config.verbose)
        console.log('Adding player %s to Cow Clicker game',player);
    
    if (typeof score == 'undefined')
        score = 0;
    store[player.name] = {score: score};
    scoreboard.update('cowclicker', player,store[player.name].score);
    
    player.sendMessage('Go forth and click some cows!');
};

var _removePlayer = function(player,notify){

    if (player instanceof org.bukkit.OfflinePlayer && player.player)
        player = player.player;

    if (!store[player.name])
        return;
    if (config.verbose)
        console.log('Removing player %s from Cow Clicker', player);
    
    var playerScore = store[player.name].score;

    scoreboard.restore(player);

    delete store[player.name];
    if (notify && player){
        player.sendMessage('You clicked ' + playerScore + ' cows! ' + 
                           'You must be tired after all that clicking.');
    }
};
var _removeAllPlayers = function(notify){
    if (typeof notify == 'undefined')
        notify = false;
    for (var p in store){
        var player = server.getOfflinePlayer(p);
        if (player)
            _removePlayer(player,notify);
        delete store[p];
    }
}
var _stopGame = function(removePlayers){
    if (typeof removePlayers == 'undefined')
        removePlayers = true;
    if (config.verbose)
        console.log('Stopping game: Cow Clicker');
    scoreboard.stop();
    if (!removePlayers)
        return;
    _removeAllPlayers(false);
    persist('cowclicker',store.pers,'w');

};
/*
  start the game automatically when this module is loaded.
*/
_startGame();
/*
  players can join and leave the game by typing `jsp cowclicker`
*/
command('cowclicker', function(params, sender){
    if (!store[sender.name])
        _addPlayer(sender);
    else
        _removePlayer(sender);
});
/*
  stop the game when ScriptCraft is unloaded.
*/
addUnloadHandler(function(){
    _stopGame(false);
});